Vocabulary#3: Simple Machines

Simple machine: A divice with few parts that makes it easer to do work.

Effort force: The force applied to a machine.

Resistance force:The force that a machine acts against.

Lever: A simple machine made of a rigid bar on a pivot point.

Fulcrum: The pivot point of a lever.

Mechanical advantige:The number of times a machine multiplies the force applied.

Pulley: A grooved  wheel that turns by the action of a rope in the groove.

Wheel and axle:A simple machine made of a handle or axis attached to the center of a wheel